I haven't seen armstrong write on crypto, cheers. Not much content in it- but at least a peek into Armstrong's opinions on them.
He has been pretty clear about his negative opinion on bitcoin. On the other hand he says we're headed to electronic money fast. Not sure how he feels these don't match but I think it's partly due to the fact governments will never allow a form of currency that they don't control. He also doesn't seem to understand the point of an anonymous crypto and how powerful it could be. Maybe Anonymint can elaborate.
According to Armstrong, there's a strong possibility that bitcoin is the "Plan B" of the government (TPTB? ); which I personally, don't rule a 100% out as a probability. I don't have proof; but let's say that I keep this thought at the back of my head.